No 13672, Wednesday 28 Sep 2022, Karaoke

Solution to 25D has been deliberately left unsolved and is to be answered only by a non-regular / novice commenter, with proper annotation. Those who have answered earlier in the week, please give others a chance.

ACROSS

1   The Spanish go after poor quality bag (6) DUFFEL {EL}<=>{DUFF}

4   They yield only diesels? Maybe (8) OILSEEDS (O+DIESELS}* Semi&lit

9   Rejected strong drinks - one lacks guts (6) STRIPS SPIRiTS<=

10 Avengers used poisonous substance (5,3) NERVE GAS*

12 Parallel loan arranged In time recording second guarantee (8) ANALOGUE {A{LOAN*}G{gUa...e}E}

13 Puzzle lacks ingenuity essentially in cryptic meaning (6) ENIGMA MEAnING*

15 Be ruined by space traveller's bombardment wiping out savings and loan (4,2,6) COME TO NAUGHT {COMET}{ONslAUGHT}

18 Head-shrinker designed starship city (12) PSYCHIATRIST*

23 Criminal relative by marriage? On the contrary (6) OUTLAW (opposite of Inlaw}

24 Move fast to break set point (4,2,2) STEP ON IT*

26 Parasite bird nibbles carnage regularly (6-2) HANGER-ON {H{cArNaGe}ERON}

27 Horror film's second hard copy is circulated (6) PSYCHO {S+H+COPY}*

28 Think highly of some nitre as urea (8) TREASURE [T]

29 Junkies consume heroin in shows (6) USHERS {US{H}ERS}

DOWN

1   Separate catastrophic accidents killed innocents essentially (8) DISTANCE  ACcIDENTS*

2   Syndicates heartlessly take back killers (8) FIREARMS {FIr{REAR}MS}

3   Once upon a time story about Indian achievement (7) EXPLOIT {EX}{PLO{I}T}

5   Frozen 50% of verdict in review (4) ICED DECIsion<=

6   What comes next is happening in silence! (7) SEVENTH {S{EVENT}H}

7   Join in battle with the awkward gang supplying drugs from outside (6) ENGAGE {E}{GANG*}{E}

8   Remains to stay in express during pleasure trip (6) SASHAY {S{ASH}AY}

11 I don't know cock ends as bird (7) DUNNOCK {DUNNO}{CocK}

14 Surprisingly centurion ignored cues regularly in strike (3,4) RUN INTO  ceNTURION*

16 Top public house located around untidy place (8) PINNACLE {P{INN}ACLE*}

17 Locates children wearing shoddy clothes on island (7) STATIONS {S{TAT}{I}ONS}

19 Perhaps locksmiths have gone through stress regularly (7) SHAVERS {St{HAVE}ReSs}

20 Workers are extremely trustworthy, religious and holy persons (7) TYPISTS {Tr...hY}{PI}{STS}

21 Formal wear of highest office of the cardinal (3,3) TOP HAT [DD]

22 Enactor flawed, right away, right away (2,4) AT ONCE ENACTOr*

25 Reckless to die out and exit (4) ?O?R (Addendum - DOOR {DO OR die} - See comments) 

Reference List

The in Spanish = EL, Only = O, Second = S, Hard = H, Heroin = H, Indian = I, Silence = SH, Drug E, Island = I, Reigious = PI, Right = R